Unlikely and too late considering all might fight was/still is considered biggest event in heroaca among folks. Cant imagine any upcoming content would inspire people who dont own heroaca to suddenly buy it.So MHA had yet another year where it sold over 5M, this time without anime boosts and with one volume less. That is the 4th year in a row btw. With the 4th season and perhaps the big arc against MLA soon maybe it is possible that it will beat 2018's numbers
Would pin more hopes on an eventual heroaca movie inspiring folks to buy the manga similar to that one one piece movie's immense effect on sparking new one piece manga buyers.