At least I have peace of mind that 2k15 MyLeague won't get slammed like this.
I'm not an every year purchaser of an NBA game (I don't particularly care for the brand, I just want something that represents basketball for every couple of years), so knowing I may not be able to use the game's career mode down the road is disappointing.
I doubt there's any legal action to be had here, for those bringing that up - most online EULA's state that they reserve the right to retire their service at any time, and I'd be shocked if 2k's didn't. So even if their support said you'd be able to play them offline I imagine they could just fall back on that EULA legally. Sure doesn't make for very good
PR, though.
As always, your choice is whether or not to buy the game next year if you don't like their practices.