It's clear the fans hate each other regardless of marketing. The league has done what it can to manufacture things, but it was probably unnecessary.
BTW, it's clear who the league considers our next biggest chances for a rivalry when you look at the scheduling. By the end of 2017 we will have played RB, Orlando and New England 9 times each. All six other East teams will have played us only 7 times. Any attempt to balance should have us at six 8s and three 7s, but MLS thinks there's a chance to build a rivalry with Orlando and the Revs in addition to RB.
The funny bit is the traditional NY/Boston thing has gone exactly nowhere. I don't think anyone here or in New England thinks of us as rivals and it does not seem like either the league or clubs have really pushed it except for the scheduling. But something has built, at least a little, with Orlando, even though we have consistently rejected the idea as forced. Their record against us -- helped along in part by the repeated matches -- has created a bit of hatred on our part towards them. I think it's a soft foundation, and if we win 4 of the next 6 we'll be back to thinking who cares about Orlando, but for now there's a little something extra to Sunday's game.