When PO brings up an interesting idea, how should a team response?

Question

Q:

if feature/idea sounds out of the box, team  must accept it in the backlog

team should analyze the feature/idea based on domain knowledge, validate the same & suggest improvements

even if the feature/idea is not so new, as the PO understands the market demands better, team should accept it. 

Team to analyze the technical feasibility and capacity before accepting the idea.

Answer 1

even if the feature/idea is not so new, as the PO understands the market demands better, team should accept it