Just a bit to clarify, as people are getting wild here...

Ravenwing Bike Squad (new troops marine bike squadRON of unknown composition)
Ravenwing Assault Squad (Seems to be the existing attack squadRON, i.e. 3 bikes base, add up to 3 bikes, add attack bike add landspeeder)
Ravenwing Support Squad (Seems to be the existing support squadRON i.e. up to 5 landspeeders)

None of these are even remotely space marines on bikes with jump packs.
And no one has said anything about any of these units being jetbikes.
Also no confirmation names are changing, from "attack" to "assault", just reported to me as "assault"