I dont know if there are summer nexus's because i quit for a year but if they do one this summer here are some ideas that me and Char (bow tie) came up with:

1. A robotic theme but robot hats, some interactive furniture, juggles and morphs. Also some interactive furniture maybe a robot that can move or talk.
2. Another idea that Char came up with is a dinosaur/prehistoric theme with fossil hats and fossil furniture/bone juggle/bone animal morph and mounts etc.

3. A 70's 80's theme with old fashioned items such as plaid furniture/hats/bodies. Some furniture or even an old car that doesnt move in your house
4. An Earth theme with a different section for each continent containing different hats and morphs and mounts, furniture, weather effects, etc

5. Char came up with this idea a while ago but a bug theme: bumblebee, butterfly, dragonfly, etc mount that flies over water and bug hats and morphs.
6. Another theme could be medieval with armor and knoght hats, princess hats furniture, or some cool armored horse mounts

Comment your ideas or which one is your favorite lol