Let’s see, we need 1020 colored deeds, the legendary tasks provides us with 6. Ignoring the extra road bump of pulling correct colors we’d need this task 170 times to get all kingdoms to 15. Once every second day to finish within a year. Looking at my collected Adventure Board data, I’ve received five legendary tasks within six weeks, less than one each week on average. And this legendary task would still have to pick the Deed task, out of four options, making it show up roughly once each month assuming fair distribution. So, going by this task alone, it’s 15 years to get the kingdoms done.
Incidentally, seeing the rewards for this legendary task also allows for a pretty good guess on the epic task reward, 3 colored deeds. If we would get this task each day we could also just complete all kingdoms within a year, except that we would be missing 102 imperial deeds.
It looks like the worst fears still hold, without paying cash the intended time to complete all your kingdoms really is at least 5 years, possibly more. It will also take deep into next year for F2P players to even get the first kingdom to level 15 due to the way colored deeds play out, unless some very generous amounts of extra deeds show up.
Looking at the numbers so far, I wouldn’t be surprised if Flash Offers come up frequently in two sizes, 10 (or possibly 3 of each) colored deeds for $5, 30 colored deeds + 3 imperial deeds for $20.