Don't take this the wrong way guys, but if you are waiting for the first update in March just to get the game, the game is probably not for you. Neither will it be a game for you in June or ever.
All they are adding in is Alex DLC (which is pointless if you don't like the game now anyway), a game store (again, not for casual fans), a simple tutorial mode (somewhat helpful, but not a main draw) , challenge modes (a little better, but still not what fans are asking for), and 8 player lobbies (which aren't what casual fans want anyway, because the main complaint is the lack of offline content).
The June story mode thing is only 1-2 hours long, and mostly likely will be half-assed.
Main point is, if you are expecting heavy single player content to be added in over the course of the game's lifetime, it probably isn't going to happen, no talks of an arcade mode yet, or if the story mode has any replayabilty.
So you are either better off getting Mortal Kombat X XL, waiting for Guilty Gear Revelator/Blazblue Central Fiction, or waiting until the game hits 20$.
Bottom line is, the game isn't worth paying more than $20 for, if you haven't bought it already, or if you don't want it at this stage. I actually like the game a lot though, but I just simply love the mechanics of fighting games, so I'm the exception that willingly takes it up the ass from Capcom... and yes... it hurts...