Allardyce and Gartside can't work together so its one or the other, no one will miss Garty but that would be up to the owner to remove him. I would also doubt that Sam would return as he has a lot to lose reputation wise and little to gain by coming back, if things went pear shaped his "Legend" status would disappear very quickly and fans expectations would be high.
I have a feeling that the managerial merry go round will kick off in the Premier League come the summer, if Moyes leaves Everton BSA could well replace him.
I have a feeling that the managerial merry go round will kick off in the Premier League come the summer, if Moyes leaves Everton BSA could well replace him.