The Americans are still keeping current president Enrique Cerezo as consiglerie to balance the cultural gap.
There are few sleeping giants in Spain that need this same investment to be frank. But FFP rules prevent that. For example how come anyone would want to buy Sevilla and face their impossible salary cap? It's a dead investment. If that's the local owned thing in Spain, it'd take decades to turn it into profit.
Salary cap is not the main problem in Sevilla, it's their institutional mess and power struggle between Del Nido (former president) and his son (president and majority shareholder today) that is preventing any serious foreign investor interest.
That said Sevilla already are partially owned (reportedly 14% of shares) by an American investment company 777 partners (
https://en.wikipedia.org/wiki/777_Partners) who are/were also involved with other football clubs but they look very shady.
Recent reports are saying that fomer board member Antonio Lappi is trying to buy the club with support of local entrepreneur Federico Quintero (founder of El Desmarque, so he would probably have a media backing too) and Monchi is very close to both of them too so I assume he would return as a SD under a potential new ownership.
A Sevillian businessman, former board member Antonio Lappí, has made an offer to the majority shareholders of Sevilla FC to take control of the club, which is currently
www.mundodeportivo.com
Don't know this Lappi guy but it's clear Sevilla are going in the wrong direction under Del Nido Jr. It's unlikely he'll let control of the club out of his hands easy though. Atleti with Cerezo and Gil are far better organized and prepared to welcome new investors than Sevilla.