What I'm hoping is that they come up with some kind of multicarts for home-brew games, maybe home-brews that are fairly old and no longer available. There are probably hundreds of games that were made well after the Atari 2600's demise, it'd be great to be able to get some of them (or at least the ones that don't break copyright laws).

I hope they come out with an Atari 7800 controller. I actually do love the hell out of the 7800, so having a European style 7800 gamepad would be nice. Maybe some 7800 multicarts too. Maybe even hire a bunch of programmers to make sequels to some of those old games. Ninja Golf 2, anyone?