Its possible, however by this stage in Spain, there's no real existing Muslim community to back up the Berber invaders, outside of Granada of course. Historically the Marinids did hold territory in Iberia, but had quickly lost it. If for some reason, Castille begins raiding across Gilbraltor, then perhaps the Marinids could retaliate and launch a counter-invasion.
The short term affects would be that (obviously) Al-Andalus survives longer and Iberia remains (more) divided for longer.
The butterflies could include some sort of alliance between the Marinids and an Ottoman analogue, both working together to control each side of the Mediteranean, that would be an interesting scenario.
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