Nah, it had good audience scores and good legs even without the EG boost.
Not so much the popularity of the character but the film's multiverse premise is what will get a big increase imo. It's been winning a lot of the fan most anticipated polls which I had thought would be dominated by Thor. Not sure if that will translate to the BO but the potential is there , and just $900 million would probably be a tad disappointing for me.