Maybe we can hope Pikachu has box office legs like My Big Fat Greek Wedding.
If we go just off the first weekend it was in 1000 theaters, and use the same multiplier for Pikachu, it could hit over $1b domestic!https://www.boxofficemojo.com/movies/?page=weekend&id=mybigfatgreekwedding.htm
Surely Pikachu will be able to replicate that!
This film has about as much chance of hitting a billion as Ash has of meeting his father again.