I can only speak for Injustice 2 but its a great game. Story mode is ace, Multiverse is great, gear is done properly and the online is really solid. Combo timing is quite forgiving also which really helps when trying to learn new strings.
I held off on SFV as the game basically wasn't complete when they released it. Now that the arcade version has been released I'm looking to try and get into it, however that'll mean a new arcade stick or a converter for my ps3 one. I'm just a bit hesitant to spend 40 quid on it if it doesn't work
Guilty gear is a solid game from what I've seen and is pretty cheap now too.
I'd honestly play fighting games more but there's generally not a lot of people on here that are interested in them