On one hand it makes complete since for the writers to bring her back; like Kay said there are clear similarities drawn between her and Twilight and lots of potential for a grand return, however there is something that makes her stand out from previous villains that makes me wonder if bringing her back is a good idea.
To make a successful return, Starlight needs to outdo everything she did in the premier; this means she has to be more powerful, more determined, and more threatening. The problem here is that all the other baddies have some level of power on their own, even Queen Chrysalis would be a challenge if separated from her hive. Starlight Glimmer without her followers is basically a unicorn mage who, while powerful, was easily brushed off by Twilight despite all of her magical training. I can only see two scenarios for her return; either she gathers an even larger army of followers and futilely attempts to successfully recreate her plans from the premier, or she manages to boost her power and hunts down the Mane 6, in the process losing what made her a creative and original villain in the first place.
Let me be clear that I do like Starlight Glimmer as a villain and I would love to see her make a comeback if it can be pulled off without rehashing old episodes or taking away from the characteristics that make her such an interesting and unique villain.