Passing over Mourinho at the end of the season, and possibly even now, in favour of a hopeful belief that we'll select a manager to create a new dynasty is idealistic but misguided. Fergie's reign is long gone from our own club and which other club out there has shown a commitment to creating their own managerial Dynasty other than Wenger at Arsenal? (Which we all know how unsustained their success has been). When Fergie arrived we hadn't won the league in 26 years and the whole make up of Football was different. Even then it took him 7 years to achieve league title success.
Unfortunately the hope of another long serving and ultimately successful manager is a pipedream. It won't happen again for a long time if ever. We finished as Runners up in '88 under Fergie before placing 11th, 13th and 6th in the next three seasons. If that happened now any manager would be out of the door with the majority of fans baying for managerial blood in the process. Look at Rodgers at Liverpool, they almost won the league, lost their best player and fell down the table. Rodgers was gone less than 18 months later and their fans wanted him gone. That's modern day football. For all we know, LVG could win us the title next season, but most of us, including me, want him out sooner rather than later. I think this clearly shows that we're not prepared to wait for success and to build their team and systems, unless that manager comes in and everything is on the up from day one without any blips.
To expect to find anyone to come in and create a new legacy is madness. It could happen organically, but to actively seek that slim opportunity rather than bringing in a proven managerial winner is ludicrous. None of the other suggestions that have been floated about have shown any long term success at any club either so why are they more eligible than Mourinho? City, unfortunately, look like they have had a clear footballing pathway in place for a few years now culminating in Guardiola's appointment. I really hope it fails - it may do - but it probably won't. United on the other hand don't seem to know which direction they're going in from a footballing perspective as the club seem focussed on Asian merchandising etc etc.
The upshot is, it would be foolish to not appoint Mourinho. They would be even more foolish to then go on and appoint Giggs.