I’ll add some possible reasons. I stand corrected on what I’m posting. Feel free. :-)
1. Additional match day revenue and annual income.
2. Hosting CL and Europa cup finals. 60,000+ capacity
3. It’s a 250 year lease, so additional match day income will also cover the the lease cost, which is currently between £4mill-£5mill a year. Stand corrected on that.
4. City will make the £300mill back at some point in the future. Then it will be pure profit from the stand, hotel, museum, retail, offices, the sky walk, events, conferences, etc.
5. Outside of the match day, the stand, hotel, retail, offices, bars, restaurants etc will make additional income, compared to the North stand now, which makes nothing outside of match days.
6. I think, think, City own the Collar site? They own most or all of the Etihad Campus. MCC have some say on the Collar site. What the actual relationship and partnership between the club and MCC regarding the Collar site is anyones guess. It’s shrouded in a bit of secrecy.
7. City and MCC are working together to deliver an appropriate use for the Collar site that will bring further investment, jobs, and possibly education to the area. But we don’t know what that is still.
These comments could be related to the future of the Collar site? An AI education campus on the Collar site, plus additional education and other buildings? But that’s me just guessing, nothing more.
Marty Edelman spoke at MIPIM about his relationship with the city council
The second plateau may involve some housing, but really we’re more focused on thinking about job creation – and when you think about job creation, we think about skills,” he continued.
“What we need to do is create educational places where young people can learn those skills that are relevant to a world in which AI is perhaps the future and the computer, in a way, is the past. I want to focus Man Life to see if we can create those spaces, which will provide opportunity for educating young people so they have a pathway to jobs.”
MIPIM | Manchester Life ponders shift away from resi - Place North West
The completion of Manchester Life’s residential-led plans for Ancoats may be in their final phase, but the partnership between Acre Real Estate and Manchester City Council is far from finished, according to Marty Edelman.www.placenorthwest.co.uk
Don't City have an option to purchase the stadium outright? It's not been optioned because everyone is happy with the current arrangement but I think the key point of @Asa's left peg is answered by the fact the club could own the stadium if it ever needed to.