Never going to happen.
I can't think of a single destination that could be served out of Dundee that would warrant a 110+ seat aircraft. Besides the A318/B736 have such a high CASM so very few airlines use them anyway.
Dundee's days as a commercial airport are numbered anyway. What's it got anyway - a single LCY flight that often runs in single figures?
There's just too much competition from EDI, ABZ and maybe to a lesser extent GLA for Dundee to attract any sort of meaningful service.