Chiming in late, as usual, which is kind of ironic for a speedster:
In my ideal world:
1) There would be an email address to send Sentinel+ files to. Those would be uploaded "by the owners." There is no way for players to upload their own characters. Why? Cuts down on munchkinism. Although, truth be told, I'm not sure that the Sentinel+ files aren't editable. I believe they're just XML...
2) Said characters had to be associated with a previous NCSoft account. I know, I know... NCSoft probably won't have kept who paid for what expansion, etc. But, if a method exists of verifying that "Real person X actually owned THAT toon," then that prevents people from camping names. Perhaps, "The Sentinel+ files have to come from the email address associated with the NCSoft account." Although I'm not clear how that would work for those who changed email addresses...
3) It's first come, first served, with names from merging servers. I'm guessing that there will be fewer servers WHEN the game comes back. So yes, there will be overlaps with names/complaints/whining. First come with the Sentinel+ files gets the names. The others get a rename token. It's about the best/fairest way to handle it, IMO.
4) If you had a previous account, you get special status, possibly a 4-6 month "subscription" or whatever to get people back in the game and let them remember how addictive it was/is. Let them see the new store, what's available, etc.
5) People with accounts previously also get a set number of perma-perks. Things like veteran points for the perk tree, Incarnates unlocked, a set amount of free Paragon Points to rebuild what you had before.
6) If in any way possible, a way to recapture SG's, or at least give some SG benefits to people that had been around for a while. The storage bins and crafting tables, the transporters, etc., would be at least nice things to give out as a "welcome back" perk. Perhaps even SG square footage. Those would have to go out to the SG owners. I could not claim my SG as I wasn't the owner.
7) Perhaps a "nest egg" of inf to get your toons back up and running (HA! Speedster humor!)
After that, unlock the doors, and let us GO HOME!
Failing that, let us buy back at $25-30 a box of "You want it? You got it!" perks that essentially unlocks all the stuff we had before.
*shrugs*