Ubuntu phone on FP1, (similar hardware as the Aquaris E4.5 Ubuntu)

Yes, but I wouldn’t wait for the FP1. The FP2 is a better candidate. But according to an old blog post and a talk by @keesj they have the MTK ‘base’ source code. So things are possible but no one knows. But they are very busy so not sure if they have time for things like the FP1 or Ubuntu OS.