A guy is talking on the phone:
Yeah. It's James Beales. Lionel Luthor is expecting my call.
So how about this: (What do you say I tell you the following?) I don't care if he's in a meeting!
Get him out of it! Tell him I found something! No! I won't hold! Get him!
I'm not sure what your question is.
"What do you say" is a familiar way of asking, 'what do you think?'

What do you say we all get together for a picnic tomorrow?
What do say we forget the whole thing and start over?

I hope this helps.
Hi, Philip.
My question is does 'So how about this:' mean 'What do you say...'?