I kinow that this game had a bunch of DLC when it was on the PS3/360. I read somewhere that the PC version had all of that stuff added in gratis and I'm just wondering if this is still true. I'm the type who normally waits for GOTY editions and similar so that I don't end up nickel-and-diming myself into oblivion.

The only DLC I am familiar with is the alternate color pallets. The game has a number of pallets included so they may be there. I never played the game on consoles so I don't know for sure.

The DLC for the console versions is palette swaps and Unlimited forms for the characters. This was all included in the GfWL version of the PC port, so it should be available here as well.