It seems like Jonah wants to join Rita in her freedom or at least recover her because he was unable to earlier in life and it seems as if she sacrificed herself to protect him and Michelle. Everyone else seems to have selfish motivations for their interest in Rita, explaining there desire to restrict Jona or perhaps pull them both in when he makes contact with Rita. At least that's what I got going by the first 23 mins.Japanese twitter just reminded me:
No, the movie does not make the reason behind this pose clear lol.
Is Rita going to canonically be the most powerful Newtype after this movie and unseat Banagher? Say what you want but I think he comfortably displayed power beyond Paptimus, Kamille, Judah and Haman.