The Sunday Times has an article on what the new investors may have planned for Heathrow based on "sources".
I can see shared bag drop kiosks for airlines being a complete non-starter, given airlines will want their own desks for premium customers:
https://www.thetimes.co.uk/article/h...port-2tdrqr8vb
Updating Heathrow’s technology is a key plank in the strategy, with a key idea being to scrap airline-specific check-in desks. Instead of, say, British Airways customers having to find their way to the BA bag drop area and endure the queues when the airline is particularly busy, they would be able to leave their bags at any drop-off point on the departures concourse.“This is all about moving large numbers of people through an airport as efficiently as possible,” said one source.
Sources say that terminal 3 could be combined with Terminal 2 to create a central hub. Separate spurs from Terminal 5 could also be built to increase passenger capacity.
Mixed mode operations are also mentioned. Again, this is likely to be a complete non-starter.