Well judging from what I've read here:
there's a chance that not all characters will be announced. Apparently the amazon prima guide reveals a bunch of stuff including "Unlock all characters and every stage". Idk how true it is or how exactly it would go but purely from speculation there's a possibility that we may not get to know everyone who's in it until it comes out. (or another early leak ha)
i do wish they would at least have a countdown on the site so we would know which events to get hyped for. When they first launched their site, they had what looked like containers on one side with a number of days in front of the largest one that would count down. I loved that because you would know around the time someone was getting revealed and got you so pumped up when you got into the single digit numbers. I don't want to trash talk Superbot because they are doing an amazing job with the game. i just wish they kept us better informed
This. The only major criticism of the game I have so far is the vagueness of information regarding new reveals. Hell, a little more communication and clarity regarding WHEN things are going to get revealed would prevent people jumping to conclusions so much.
This is where I feel All-Stars could really have done with a Smash Bros-style Dojo site. That site was awesome for promoting Brawl due to how regularly it updated, especially compared to the erratic way Sony have been doing things.