Why i think season 5 isn't the last one for dragons rising

So let's get this clear i see many talk about if season 5 is the last season but I don't think that's for sure true because there is still a lot left to be answered Based off the sets it seems the never realm is returning and zilvar will be main villain for part 2 Each part 2 of dragons rising seems to be focused on each source dragon Drs1p2 was Energy Drs2p2 was motion when lloyd received a icon of motion from the source dragon Drs3p2 was focus I assume drs4p2 will be for the source...