We know they'll still be doing brushable ponies, since we've seen various glittery critters on Taobao.
Yeah, but sadly they are all re-releases. No new actual characters as far as i know.
Yes, the "newest" one I've seen (besides more mane 6) is the regular winged Ploomette, but even she's a character we've seen before. No new ones.
Yes I dont think we have seen anything "new" - all the playful ponies which we have seen this year were previewed at the Fair and technically no other new characters.