My proof is this. Just gave this a thought. Maybe its jyst my perception and belief . I thought that after the first 2 movies(bog and rof) were succesful they brought back the anime. Now we have broly movie and another 2nd movie. So if the 2ndd one is succesful like rof was i think they bring back the anime because they waited for 2 more movies again like last time they did bog and rof.This might be a bizarre way to think of it but thats just my take on it