More from Reddit (all rumors):
Welcome Mama Odie, 4h (RUMORED 9000 EC, 30 gumbo, 14 torches, 14 ears)
Build Goin' Down the Bayou, 4000 EC (requires Mama Odie level 2)
Welcome Tiana, 4h (RUMORED 11000 EC, 50 gumbo, 15 beignets, 14 ears)
Tiana's Comfy Costume unlocks (14000 EC, 10 ears, 15 glitch fabric, 9 Comfy Tiana fabrics, 4h)
Build Mama Odie's Tree, 14000 EC, requires Tiana (lvl 2)
Welcome Dr. Facilier (unlocks Fri 3/8) (RUMORED 60 gumbo, 7 necklaces, 7 ears, 12000 EC, 2h)
Max RUMORED Levels for characters to complete event: Eudora level 6, Naveen level 6, Tiana level 4, Mama Odie Level 4
So, start hoarding gumbo!