If "online impressions" is their definition of success (they were using it last year as well), I'd wave goodbye asap.

There was talk of a 13 team SL for 2021 at one point. If the oddities of an odd number work for 13 then 11 could too.

Promotion from the Championship without relegation from SL in ‘21 perhaps?

The invitational tournament for Championship clubs theyre holding in October will be how they promote a club/clubs to Super League

Nope, not what the RFL say at least. (which probably means it will)

I suggested this several days ago with the top six playing a mini tournament with the winner gaining promtotion to S/L.
I just cant see how they could allow Toronto back into S/L

They couldn't announce it until Toronto's fate has been decided, that could drag on for months.

We don't even know what might happen next season, with or without Toronto. SL is in a very precarious position.

MLSE could be interested in buying the wolfpack according to their CEO....

There's a meeting tomorrow to discuss this year's Challenge Cup. The suspension of the Championship and League One and Toronto's withdrawal from Super League has created some issues. As a reminder the Sixth Round draw is

Leeds Rhinos versus Hull Kingston Rovers.
Newcastle Thunder versus Toronto Wolfpack
Salford Red Devils versus St Helens
Sheffield Eagles versus Hull FC
Wakefield Trinity versus Featherstone Rovers
Widnes Vikings versus Catalans Dragons
Wigan Warriors versus Warrington Wolves
York City Knights versus Castleford Tigers

Potentially Hull FC, Castleford or Catalans could get a bye into the Quarter Finals then draw Toronto and get a bye into the Semi Finals.

There are a number of solutions being discussed including the possibility of a redraw, although who knows how that would work with ten Super League clubs left in.

Sheffield have pulled out of the Challenge Cup.