This review is for the complete comic, not only this strip. I actually just found out about this great comic via Equestria Daily and read through it in one large session.
Your drawing improvements over the series are tremendous and it was certainly a good idea to update the first strip to get new readers attached. The entire story was very believable, following the original stories of their respective universes. I don't think that this comic needs any follow-up as it is now, as it feels perfectly rounded up. Many moments were really touching, for instance when the Doctor left for that dinner with Lyra, leaving Derpy behind.
I can only imagine how much time and dedication this has actually taken, but you have clearly put a lot of love into this. I wish you best of luck for future projects, and here's an obligatory brohoof: /)