The front rail looks strong enough but there isna good enough picture of the back rail but in either case I would add a pair of legs under the ends of the table to support it. That wing looks pretty heavy and the saw looks pretty light and It might want to make it tip over besides possibly putting too much strain on the rails. Putting legs on it allows the addition of a shelf underneath which is handy for storing blades and accessories like a tenoning jig for example.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.