Meh, Battlefield was an incredibly down to home FPS, a true pioneer. But, at the same time, you can't really say Black Ops will be bad just because of the series. It's not made by IW like ShitWarfare2, and I think that Treyarch will do a good job with it. MoH is made by DICE, a really infamous game creator, but nonetheless makes great games I will always enjoy.
I think if I really want to get the better game, I will just buy both. I really want to get in on the BF3 beta XD.