The point is, he's teasing characters he intends to highlight. I highy doubt we are getting 10 1v1's, but this evidently a big conflict coming.
It wouldnt be called a "seige" if they escaped in 3 chapters. Also the fact that Saturn wants Kizaru to protect 3 things, absolutely means that shit aint going to pan out the way they want considering this scene:
Im not sure why people think this is a repeat of WCI or something, or even expect the crew to escape with no issues.