You have two hours to play CoH. (Hypothetical)

[Paragon Avenger]

I'd respec my lvl 50+ wp/fire tank and get the new inherit pool powers that he didn't have and figure out the best IO set bonuses for him.  And spend about 6 hours doing that.  Then I'd run all the incarnate stuff to unlock all the incarnate slots and fill them with tier 4 "enhancements".  Then I'd run a demon farm or AE farm for lowbie's.
What?
Two hours?
that's crazy, might as well just run Icon and fly around.
Lately, I used benpc in ICON to turn into the Golden Roller.  Then I fly around pointing down so to stay on the ground, but look like the car is actually driving.  And then I try to follow the streets.  It's about 2 hours of fun.

[Inc42]

Definitely an ITF or two. It's short, it's fun, and there are always plenty of people wanting to do it.

[ukaserex]

Two hours....I'd make a shout for a UGT and a Really Hard Way run.
I'd bring my blaster to the UGT, and my controller to the Really Hard Way.

[MaidMercury]

I already did go through this scenario in Dec. 2012.....I played my Healer and pretty much teamed with others like any other day...
perhaps chatted more than usual 
I did meet someone I hadn't seen in ages on that day.

we played like normal, except we were sad knowing NCsoft was shutting us down.
To this day, I haven't played any other game.

[ricodah]

Two hours isn't much time to do a lot.  Would probably crack jokes under Atlas or Rikti Mothership Raid.  Or if they started up some of the events, the Praetorian invasion was fun after the first hour of continuous lag.

[Castegyre]

Fly and teleport all over the place and chat with people while I do it.

[artbunker]

Enjoy using my ice blaster  again

[Rejolt]

Can I set up something before the two hours? I'd love to uber purple IO a Peacebringer just for the hell of it and go farming (just to have a regular Warshade out farm me.. but, eh...).

[Ultraamann]

I'd log in Ultraamann (Inv/SS tank) and go to Monkey Island and just herd and foot stomp rikti monkeys endlessly... then maybe grab as many people as I could find and go to the Monster Island and just pummel the crap out of the giant DE monsters there.  I've never come across anything in any game as purely superhero metal as flying into the face of something 10 times your size and punching the hell out of it...

[JKPhage]

Oof, tough choice. I'd probably have to choose Ocean Knight in the hopes that I could put together a good team and steamroll a Romulus. I always loved that taskforce, and it was perfect for Ocean Knight, with his Poseidon powers and golden trident. It'd be great fun to tank Rommy with my coral guardian and try and hold him with sharks and such, then get to lay into him with my stabby fork once his guardians were down.

Failing that for some reason, I'd go with Magical Master and attempt an STF. MM was kind of my co-main with Ocean Knight and he was damn fun to just do anything with. I almost managed a Master of STF badge with him once when I helped tank Recluse with my phantoms.

Overall though, the Rommy with Ocean Knight would win out. It was just such a fun and unique TF that it'd be a great way to send off the game. Given the option, though, I'd much prefer being able to play the game forever from here on out.

[SilverDemon66]

I would log onto my fire/fire brute and do some farming in AE... NOT! I would probably ask all my friends to jump onto their best toons to form the ultimate A-team and try to tackle the hardest TF/SFs! Oooh, maybe I'd try to get a group together to finally get a chance to take down the villain Hami just to tie up that loose end.

[Relitner]

Unless Waffles can recover the IP from the corpse of the evil beast

You'd have to camp that spawn for weeks. I understand it's a fairly rare drop. 

[Floride]

Two-hours? Well, teaming would suck. 8-person teams would basically be 8 soloists in one mish, ignoring others and not helping/cooperating. Basically, everyone would have scrapperlock. Which would lead to lots of hurt feelings, to lots of smack talk in broadcast chat, to others trying to get them to stop. And lots of arguments about conduct about appropriate gameplay styles which were never issues when time was unlimited.

I think I'd just hop on my kin and go skiing for 2 hours. But I'd make time to visit Galaxy City. I miss that zone.

[TriNitroToluene]

1.  I'd grab Long Shock, my electric blaster and main toon.

2.  Go to Independence Port and order some Lusca to go.

3.  Go to RWZ and start a Mothership Raid.

4.  Go to the Hive and run a Hamidon Raid.  Okay, I am not qualified to run one, but I could join one.

5.  If times permits try to get all of the other wandering Monsters that roam the city

Good times, especially once leagues were introduced, so you could monitor everybody.

[Paragon Avenger]

So for these 2 hours, do we have our old characters?
It has been mentioned that we might be starting from scratch.
If starting from scratch,
I would like to take a group through the sewers starting in AP and going all the way to KR.
Level, get the police radio.
Run missions to get the jetpack.
And then go to the hollows.

wait, no, fly is available at level 4 now.
This changes everything.

Ok, street sweep to level 4
get the fly power
go to the hollows

Wait, no, I would buy the rocket board
So, farm Death from below
and then go to steel and do the midnighter arch
and explore the library.

No wait, access to the midnighters' club can be gotten by going to the spooky mansion in the night ward.

Ok, farm the heck out of death from below
Do the TF's
Do the respec trial
Do the other TF's

No, wait,  TF's can take 2 hours just to get the team together.

Ok, farm the <grapefruit> out of Death from Below.
Make stupid puns in team chat.
And right before the 2 hours expire, get kicked from the team

That's perfect.