Keep in mind: People are guessing its a month or two away based on the German server. People have guessed correctly the time frame of the releases for both Edo and Jin I Treasure from that server.

based on the other treasures and updates on the China server, you'll have enough time to get both roshi and han. Also, don't forget seal scroll rebates happens twice a month.

If I had to guess based on the German server, 3.0 could come out sometime this summer (1/2 months). The interval was about 2 months on their server.

He means the ninjas quiz and only if you get 10/10 then you can get a chance of getting seal scrolls. Survival is pretty obvious which is the rewards in the survival trials. You'll have a higher chance of seeing seal scrolls at 11//12 trials done, 12/12 trials done, and in trial breakthrough.