Ok so I got injustice about two weeks ago. I spent a few hours practicing Flash combos, mostly because I am the biggest Flash fanboy and wanted to play him.
I could get them, somewhat inconsistently, but when trying to apply them to real matches I failed miserably, mostly because two of his three mixup starters require him to be so close you can feel the opponents breath.
I pretty much don't play it for a good 8-10 days or so. Friday night, I get bored and pop it in to fuck around with other characters.
Jesus christ Solomon Grundy does a lot of damage off of such easy combos. I had combos that, even if I fucked them up halfway through, did as much damage as the Flash's best non-trait combos.
So I think I'm just gonna fuck around with Grundy and Black Adam for a while.