> the involved registered company, in this case, the MorphOS team

Except that the MorphOS team is not a registered company.

> the MorphOS team can partner with another Amiga company which does hardware,
> such as, for example, Acube.

ACube doesn't develop its own SoCs either.

> the Warrior platform (released 2014 to market)

2013 (P5600).

https://morph.zone/modules/newbb_plus/viewtopic.php?forum=3&topic_id=11623&start=27

> An 14nm process p6600 or i6400 will beat the power efficiency of a
> 14nm process ARM or X86 processor

I6400 and P6600 are at 28 nm (from 2011). As soon as they (or rather their successors) are at 14 nm (from 2014), ARM and x86 will be at 10 nm or smaller.

> While the MIPS seams the most likely candidate, if it doesn't work, another
> power-efficient architecture will take the spot. It may be the Power8 and successors

Not likely in case of POWER.

https://morph.zone/modules/newbb_plus/viewtopic.php?forum=3&topic_id=9463&start=105

> it may be possible to use the closest existing p6600-SoC to the specs and to add
> the missing functionality with existing side chips.

Yes, on the hardware side this would "only" leave board development.