The Norwegian believes that the prospective return of the famous Old Firm derby is positive for Scottish football.
After a financial meltdown in 2012 saw them demoted to the third division, the Glasgow giants look set for a top-flight return next season.
Mark Warburton's men boast an 11-point lead over second-placed Hibernian at the summit of the Scottish Championship and, barring a monumental collapse, they should well be back in the big time come August.
Should they win promotion, it would rekindle Rangers' famous rivalry with Celtic, with the bitter enemies contesting just one game since the relegation - a League Cup affair 13 months ago, which the Bhoys won 2-0 at Parkhead.
That remains as Deila's only taste of the Glasgow derby, but the Norwegian believes that the return will restore an element of spice to the top flight.
"It is a big club and if or when they go up, they deserve to be there,” Deila is quoted as saying by The Scotsman.
“It’s going to be an even more interesting league. Of course it will bring more spotlight on Scottish football. It will be good for the whole league.”
Deila's men are six points clear of Aberdeen as they hunt down a fifth successive SPL crown. They host Dundee FC at Celtic Park tomorrow.
Rangers, who have lost just twice all season, welcome Raith Rovers to Ibrox tonight as Warburton and co bid to move a step closer to promotion.