I am less concerned with the characters and bases, although getting those back would be nice (and some of my base storage for salvage was over-full from when you collected salvage, but didn't use it and storage had a max of 999 items). You could remove stuff, but not replace it until the count got back down.
The main thing I'm concerned with is the account data, veteran rewards, stuff purchased (including character slots, powers, etc.). Either that, or allow you to spend $50.00, get 2 months subscription, and everything that was available for purchase at some time in the game. I realize there are probably a few things I didn't purchase (like the Wedding Costumes - just didn't feel like something I wanted).
Yesterday, I found my Statesman figurine that was part of the CoH CD edition (CoH originally came out on floppy, and you got a cape and Prestige Power Slide (another run power you couldn't get anywhere else - even in veteran rewards or at the store) for that edition). My computer desk has the mouse mat from the pre-order of Going Rogue and my wife found the box for CoV (I pre-ordered that too, but wasn't really interested in the Helms).
Final thought - I just hope that Iron Wolf has been honest with us. I hate to see a post like "April Fools!"