Without flipping the lid on their financial expert Sevco moon howlers - I think Celtic will have massive financial challenges and won't be a very attractive prospect.
I think their operating expenditure was around £80m - and to cover that they need Champions League money that they've not had for a number of years now - and sometimes even then they've had to sell one or two players at a big profit (Dembele / Tierney).
Next season (even finishing second) they'll have a crack at the Champions League - but there's only 2 spots for non Champions, they'll be unseeded, and they'd need to overcome the likes of Benfica/Sporting/Porto; Dinamo Kiev or Shakhtar; or Salzburg.
Lennon has a rolling contract so they're probably looking at £1m-£2m compensation for that - more if they pay off his backroom team.
They also then have the likes of Edouard, Ntcham and Christie (plus others) desperate to get out. And the likes of Elyounoussi, Laxaalt and Duffy are all loan signings. And that's before you look at Brown and Griffiths who must be nearing the end.
So they'll need to rebuild a fair bit - and it's questionable whether the money will be available for that. And without the money - and with that level of rebuilding - they're also not going to attract a 'top' manager.