If you take a look at UEFA country ranking for 2017/18 season (
http://kassiesa.home.xs4all.nl/bert/uefa/data/method4/crank2017.html) you can see that with good 3 years it is possible for Serie A to overtake Germany and England at that time.
For 2018/19 season (
http://kassiesa.home.xs4all.nl/bert/uefa/data/method4/crank2018.html) Germany advantage of 11 points from 2010-2013 will not count anymore so if you plan on making a Serie A comeback to top 3 in 2018 right now Italy is basically on the same spot as Germany.
I don't think it will happen that soon, but what looks promising is that at least Roma and Juventus are ensuring their place in Champions League for a few years (I hope) which should make them climb to pot 2 at worst, just like Bundesliga teams did, with their consistency of teams representing them in CL.