That's the endgoal. BB seemingly has a multi step process to achieving it.
For one, he wants to establish Hachinosu as a WG-affiliated island. Garp is an icon of the marines and among the strongest in the world, they most certainly do care a lot about him. Enough to create a deal.
Nobody gives a shit about the plot of Freeza or Cell. It's their presentation as villains that appealed to the masses (presence/design/charisma). I also don't know where you are getting this strange idea that an evil alien space tyrant and a bio android were innovative concepts back then. The...
Just finished. It has cool fights and the last several episodes were enjoyable for me to watch for pure hype factor, but that's pretty much it. I definitely wouldn't rewatch the entirely of this ever I think. 90% of this was poor attempt at an adventure story (I don't think the adventure aspect...