A big thing. Imu calls Teach Davy Jones, like Luffy to Joyboy. It does at least further solidify what we already suspected.
The only real question is if Davy Jones had a God power and that was transferred to teach (i.e. the weird body thing/how teach can have multiple powers). It'd make sense to me if Teach, like Imu and Luffy, are one of the 4 deities in that case then, and Teach just hides that fact.