There is no specific an exclamation form with -네요. If you want to make an exclamation form, just put a exclamation mark at the end of the sentence.
빨리 치워야 겠네요 > I/we should quickly clean this up.
빨리 치워야 겠네요! > I/we should quickly clean this up!
빨리 치워야 겠네요? > Should I/we quickly clean this up?