I have to give this movie a fail (spoilers)
Why?
Because they UNWROTE what is the basis of the first movie, that is, Bill and Ted become the greatest rockers of all time and all of society is based upon these two numbskulls.
The whole joke is that they're not there yet, it's the future great potential that lives inside of them that will change the world. For now (or then), they are just two dudes who are trying to figure life out, thrust into a time-travelling adventure.
Bogus Journey ends with them FINALLY becoming the rockstars that they are destined to be.
But in this one, they're losers again and BIG TWIST, their sons (now daughters) are actually the ones who will unite the world with their music.
Wait, what?
Any movie that rewrites the ones better it get a fail for me.
It's dangerous to try and EXPLAIN previous movies, but REWRITE?
NOT COOL!