Sure, I think so... but with that you risk joining the party after they've resolved all their conflicts. A little bit like what almost happened here

oh ok i''l leave if you what your saying

but let me know when you want to start the new character intro or appearance

Lol, no that's not what I'm saying. I just mean you might join when the adventure is over if you join an adventure thread

oh got it but do you want me to join your team

 Hey can i join your group? maybe as a surprise character during a raid or a trapped by enemies