I think the only "sure" thing is Jalen will graduate from Alabama in December after he gets his 15 credits this semester. That's the only thing I think anybody can be sure of.
Crazy, outside of the box---Jalen could be 100% committed to the team, play in every game this year as needed, graduate, and find a power 5 school that already has a top tier quarterback in line for next year. Next year, he could learn the new system, play in 4 games as a backup, and red shirt next year. Then be in line to start in his final season at the new school.
IMO, if Jalen is going to use the new redshirt rule it will be this year. I don't see him "wasting" a year of eligibility in a backup role at Alabama this year to go somewhere else next year and sit or use the 4 game rule there to only be able to play one more year his redshirt SR. year.
I think he thinks he's good enough to play the position in college and maybe the NFL. I also think he's mistaken about an NFL career and maybe daddy Hurts is to blame for that. I do think he might could play QB in the right system that doesn't depend on reading complex downfield routes. But he's not going to get to the NFL.
So, IMO, he'll either not play in more than four games this year OR he'll leave the team and get his degree and then he'll go elsewhere and play 2 years in another system.
How this will be decided is, as CNS said, an "internal decision."