I run a prediction tourney on a forum I'm on and this is what I put together for WM31 (wall of text incoming....):

Part 1 - Match Predictions (7 points per correct prediction, 15 Points bonus for getting 5 or more matches correct)

WWE World Heavyweight Championship Match

Brock Lesnar (c) vs Roman Reigns

The Undertaker vs Bray Wyatt

Seth Rollins vs Randy Orton

Sting vs Triple H

WWE United States Championship Match Rusev (c) vs John Cena

WWE Intercontinental Championship Ladder Match Bad News Barrett (c) vs Dean Ambrose vs Stardust vs R-Truth vs Luke Harper vs Dolph Ziggler vs Daniel Bryan

The Bella Twins vs Paige & AJ Lee

The Andre the Giant Memorial Battle Royal Participants include: The Miz, Curtis Axel, Ryback, Fandango, Adam Rose, Zack Ryder, Jack Swagger, Titus O’Neil, Darren Young, Big Show, Kane, Erick Rowan, Damien Mizdow, Sin Cara, Goldust, Heath Slater, Mark Henry, Konnor, Viktor, Hideo Itami (others may be added).

WWE Tag Team Titles Match The Uppercats (c) vs The Uso's vs The New Day (Big E & Kofi Kingston) vs Los Matadores

Part 2 - Match Card Order (7 points each correct + 15 Points bonus for 5 or more out of 10 correct)

List the match order from Main Event (Top) to Opener (Bottom). Eg.

Main Event - Divas Tag Match ......etc ......etc ......etc Opener - Lesnar vs Reigns

Part 3 - Event Questions

1. Will there be a backstage interview? If so, who will conduct the interview? (5 Points per each correct answer)

2. Which match will last the longest? (10 points)

3. How many title changes will there be in the whole PPV (including pre-show)? (7 points)

4. Who will referee the main event? (Check http://www.wwe.com/wwereferees/wwe-referee-bios) (5 Points)

5. How many finishers will we see during the WHOLE PPV??? 1-3, 4-6, 7-9, 10-12, 13-15, 16-18, 19-21, 22-24 etc...... (10 Points)

Part 4 - Multiple Choice - You must pick THREE choices - (You guess wrongly and the points available for the question will be DEDUCTED from your total!!)

A) Paul Heyman will turn on Brock Lesnar and help Roman Reigns win the title. (10 Points)

B) There will be a Ron Simmons "DAMN" moment backstage. (5 Points)

C) There will be a surprise return by a WWE Superstar/Diva. (7 Points)

D) There will be blood in one of the matches. (7 Points)

E) Another match will be added to the card. (5 Points)

F) Michael Cole will say "VINTAGE" at least twice or more. (7 Points)

G) At least four competitors will have an extravagant entrance. (5 Points)

H) Seth Rollins will cash in his MITB contract. (10 points)

Part 5 - WrestleMania 31 BONUS Round!!!! 7 points for every question correct (unless otherwise stated)

1) How many German Suplexes will Brock Lesnar hit in the WWE WHC match? (1-3, 4-6, 7-9, 10-12, etc...) (7 points)

2) How many near falls will there be in the Taker/Wyatt match? 1-3, 4-6, 7-9 etc.... (7 points)

3) Will J&J Security get involved in the Orton/Rollins match? (7 points)

4) Will anyone (outwith Stephanie) get involved in the Sting/Triple H match? (7 points)

5) Which man will get his submission hold in first in the US Title Match? (7 points)

6) Who will be the first man to go for Intercontinental Championship in the Ladder Match (At least one hand must be touching the belt to count). (7 points)

7) Who will get the pin/submission and who will it be on in the Divas Tag Team match? (4 points per correct, 7 points bonus for both correct)

8) Who will be the Final Four superstars left in the Andre the Giant Memorial Battle Royal? (4 points per correct, 9 point bonus for all correct)

9) Who will start off the Fatal Four Way Tag Team Title match? (4 points per correct answer, 7 points bonus for both correct)