This is by no means set in stone.
2014: Story and Design
3Q2015: Internal Prototype completed. Multiplayer battles, investigating planets. (completed)
4Q2015: Founders Program. Fans of the original will be able to apply to become a founder. They will gain access to the vault and private forums where we can discuss what we're doing more openly. NDA required.
1Q2016: Founders begin to provide design feedback.
2Q2016: Founders get the tools we have. The objective will be to help get the modding community going.
3Q2016: Founders finalize with us the canon and get ready for Super Melee.
4Q2016: Founders Program Phase II begins.
1Q2017: Super Melee Prototype with select Founders.
2Q2017: Planetary Exploration implemented
3Q2017: Custom Ship design implemented
4Q2017: Super Melee BETA! / Stellar Crafter built.
1Q2018: World Crafter built / Adventure Mode built
After that it is all TBD.