I heard that she will remain an alicorn. Plus, I want her to stay an alicorn. They did this, and they can't just take it back. If they make her transform back for more than just an episode, I will be very disappointed with them.

I would like to see more exploration for other species and characters we could possibly see more of now like Celestia, Luna, Cadance, Shining Armor.

The only thing that I am really hoping for is more stallions.... ones who stick around and have personality. Not hating on the characters we have now, but still, they could atleast add one reoccurring stallion for us to enjoy.

I hope that they keep EQG cannon, as it takes place soon after the corination from MMC.
They have plenty of story potential with those wings, flying lessons for her and Scootaloo, seeing more trips to pegasus socities and the return of Gilda. More gryphins besides her and Gustav would be fun too.
I know I'm not alone in thinking Rarity should get an episode or three... Spike could finally ask Rarity out, either he gets a spell or perhaps even better, a potion from Zecora! I loved his interaction with her, there should be more! (and him with the CMC was great too!)
Perhaps a return trip to Apploosa or Braeburn pays ponyville a visit!
Or what about a 22 Short Films About Springfield style episode that spotlights moments in all the background ponies lives! Gotta think the fans would love that!
Finally, we see AJ, & Rarity at work plenty,but what about the others?
Twilight in the library sure, but Rainbow Dash, Fluttershy & Pinkie Pie? Not so much.
What do ya think? Good ideas?

I don't know, I'd like to see how things go as they are. ;) Maybe more multi part episodes, or a story arc? :)

I hope they explore other species and cultures. I want more exploration in wider Equestria, maybe some look into the other nations, like the Griffin Kingdom, the Buffalo Lands, Zebra Lands, Diamond Dog nation. I have quite a great desire to see something about hybrids, the offspring of ponies and non-ponies. They have a mule, but they could show more like hippogriffs and zonies.

And on the Twilight question I support either absolute abdication or a slow removal of resposibility and the revocation of the body.

I think in Season 4, there will be new enemies, new discoveries with new places unknown to Ponyville. New rights, new spells, new tricks, & harder bucking to the faces. All on new adventures, with fun, & Pinkie Pie!