Actually, there's more than a challenge in this project. I guess that choosing/creating 52 endings will be the hardest part of learning/arranging 52 songs.
Thanks for the invitation. Of course, I'd like to take some more challenges --although I'd need more hours in my days. Anyway, participating in one of the Seasons has been in my TODO list for some time. Let's make it happen!
Maybe one of your personal-challenge songs will fit an upcoming Season's theme, and you can re-record it with a Seasons intro. Simple. Only one song posted in a Season makes you a Seasonista and you can get a cool image for your profile page.