Update
Avengers
3928
5088
77.20%
Deadpool 2
305
2042
14.94%
Avengers is now 97% of TLJ ($214.2M), and 79% of BP ($160.6M)
TLJ seems like the safer bet, not only because I don't see this going sub-$200M (watch me jinx it), but also because the area my theater's in is strongly biased towards black-led films, so it's not a totally fair comparison.