Great idea but could it be tweaked
The reason i say this is in some cases clans seem to enter clan wars thinking "if we win its a bonus if we lose no great loss".
My clan wars 2 days on 2days off to get stronger together between wars and be consistent. But if this tournament was launched i am sure my clan would step up to the mark when we are ready to but if we are competing against a clan that finishes starts again we will never get a look in.
Constant war does not benefit us at the moment or in the foreseeable future but we like to war and we are good at it but its not the only thing in the game.
Would it be a good idea to have leagues for different strength clans on a seasonal basis rather than just we have strong rich players that can war 365days a year dominating another leader board.
i know i have spent more gems on clan wars ensuring my members have the troops they need than on anything else in this game.