I think she will be ruler of magic considering of how she can use a lot of magic as a unicorn.But now that she is an alicorn she can use that magic with less effort and be able to use even stronger magic.
I don't think she will go past alicorn but possibly she could become a higher level of alicorn like celeastia and luna are not normal alicorns there a much higher level of alicorn.... maybe twilight could go beyond there level and be able to overthrow luna and celeastia and take over equastira.....
this looks okay but it does have some flaws like the suit having low quality, and the background is a picture from the big apple so ill give this a 6/10
I think twilight being a alicorn could hold some nice episodes. It can go deeper into the bond of twilight, ranbowdash, and fluttershy as the 2 teach twilight how to fly.