Please don't spoil this to other people who want to wait for more to come out, keep it to yourself!
Some teasers and plans for the 2Pack

2PACK PROGRESS:

Molten Volcano: Finished, PTU
Frozen Farlands: Indev
Lost Labyrinth: Prone to removal.
Techno Tyrant: See MVZ.
Hydrocity: Subject to removal/Indev. May be a replacement for Lost Labyrinth.

ZONES YET TO BE MADE:
Lakeside Park
Decaying Void
Cobalt Core
Hydrocity
Hydro Coliseum
Carnivorus Canyon
Sunset Dreams (Unlockable)
Mellow Plains (Unlockable)
Volcanic Legacy (Remaster of Volcanic Wireframe, Unlockable)
Sunset Caverns (Unlockable)
Molten Volcano (Encore)

PLANNED ZONES:
Molten Volcano Act 1
Molten Volcano Act 2
Melted Core Act 3 (Boss)

Frozen Farlands Act 1
Frozen Farlands Act 2
Blizzard Tundra Act 3 (Boss)

Techno Tyrant Act 1
Techno Tyrant Act 2
Electrical Hazard Act 3 (Boss)

Cobalt Core Act 1 (Metal Sonic Fight)
Cobalt Core Act 2 (Brak Fight)