I just have a hard time getting behind these Universal rumors. Yes, I realize they once owned a large share of the park, but the company has changed significantly since buying into PA. They've built several parks since then and their ride, theming, immersion, and design standards have all changed dramatically. They also almost exclusively theme their attractions to their IPs. Non-IP based attractions are very rare nowadays. Port Aventura would also require so many areas and attractions to be completely overhauled to eliminate outside IPs like Sesame Street, Ferrari, and now Uncharted. Additionally, there are a number of rides that I'm not convinced Universal is going to be willing to deal with, notably the wood coasters.
I know I'm setting myself up to eat my words, but the idea of Universal buying back Port Aventura just feels farfetched. It definitely makes sense for them to regain a presence in Europe. I'm just not sure this is it. And if it is, I feel like the park will have a substantially different look within a few years of purchase. I could almost see them closing the place for a year or two for a substantial makeover. Rather than build a brand new park, buy an existing park (PA) with pre-existing infrastructure and completely remodel it.