Neverwinter seems like it was designed with this eventuality in mind, so this should be pretty painless. I don't see how they plan to do this on last-gen consoles though. They aren't powerful enough to handle this kind of game. The Wii U maybe, but the others simply have too little RAM.
That said, while porting to the PS4/XB1 would be a LOT easier (as they're basically PCs), Champions Online was originally designed as a MMO for the PC/360 (and was supposed to use the Marvel license instead of the Hero Games/Champions one). There's even full support for the 360 controller built right in.
Also, the PR doesn't mention what titles they're planning on porting, so who knows what exactly we'll end up seeing.