This has been suggested in the past and found unfeasible. Judging who has the best prediction is, from the get-go, unpratical. A prediction is only good if it actually comes to pass. And most of the time, a prediction may not come to pass immediately and be deemed wrong, only to be proven in an unknown future. As you can imagine, a contest needs times and needs something that is more tangible to judge than a simple prediction.
The same goes for discussion threads, reviews, posts, etc that fall upon the broad description "manga discussions". It has been suggested in the past that there could be a contest for this but that was never found to be possible.
Thank you for the suggestion though. I'll still pass it on to the upper staff.
