What you want seems to me to be a stun or an airborne-send, and barring that somebody who removes specials rather than destroys them. Vulture/G4mora (or Bishop/G4mora) into deadliest woman can be reliable as long as Vulture can make it into the air, as previously mentioned.
Alternatively, tile theft rather than destruction is probably ideal, like DD5's purple, or maybe Prowler? I don't know if his thing counts first as a match against BRB, I'll have to test it.
I'm not promoting any of these as especially viable strategies, but if you want to play around here are some characters who remove (rather than destroy) specials:
4* Thanos (passively eats some SAP tiles and turns them into greens on the board, your mileage may vary here, given that BRB has a buck wild green power, and feeding him is not desirable). I actually feel like Th4nos is pretty under-rated against special spam, but he is probably better against a Carbage than a BRB unless you have a stunner
4* Invisible Woman - locking those tiles and then removing them to do damage can be pretty effective, if you can get the blue for it
4* Dazzler - bring your own SAP generator and get her to tank, and she'll stun whoever hits her and remove some function of ANY type of special tiles on the board at the same time. Really suffers from being hard to tank over better characters, but this moveset is a perfect counter to Overclocked and other special generators on paper
4* Shuri - if you've got the red, at 5 covers that power will remove a fortified special. this can really save your bacon against powers like Photonic Barrage, or i suppose BRB's blue CD
4* Howard (a duck) - his blue will both stun AND convert 4 enemy specials to basic. Laughable, but can actually work with a sufficient blue battery (costs 10ap)
4* - Spider-Woman purple can remove 6 enemy specials for 8 purple
4* Cage - if an enemy fires a power and he's out front, he'll remove a tile and weaken another. Maybe not fast enough to matter
Spider-Family characters tend to be able to lock down enemy specials with webs, that can sometimes help in these situations where rampant AP gathering or special creation is an issue.
that's all theorycrafting, so i guess take what you want to try from that.