Odds will look like this:
0.) Sky5 for the NES - 1,000:1
You bet like this:
0.) 10 Gold.
Try and make your betting as clean as possible to make it easier to tally up the scores when things are revealed.

If you have something you'd like to bet on, let me know - I *may* add odds for it to the OP. Good idea - "Will Figure X get a repose?" Bad idea - "Will it suck?"
I may try and work out a prize for the overall winner. No promises though.

1.) Sky 5 for the PS4 - 1:1
2.) Sky 5 for the XBox One - 1:1
3.) Sky 5 for the Wii U - 1:1
4.) Sky 5 for the 3DS - 1:1
4a.) No Sky 5 for 3DS/New 3DS - 10:1
5.) Sky 5 for the PS3 - 2:1
6.) Sky 5 for the XBox 360 - 2:1
7.) Sky 5 for Tablets - 3:1
8.) Sky 5 for the Wii - 5:1
9.) Sky 5 as a New 3DS exclusive - 10:1
10.) Sky 5 for the PC - 20:1
11.) Traps work (in any manner) with Sky 5 - 2:1
12.) New, Trappable Villains in Sky 5 - 3:1
21.) No new "gimmick" figures (akin to Giants, SWAP, Trap Masters, etc.) in Sky 5 - 10:1
22.) New Spyro repose in Sky 5 - 2:1
23.) New Boomer repose in Sky 5 - 5:1
24.) New Ghost Roaster repose in Sky 5 - 5:1
25.) An Eon's Elite (or similar) "Series 2" set of reposed figures. - 2:1
26.) A LightCore sub-series (not just a few pieces with LightCore features thrown in) - 5:1
31.) No new reposes at all in Sky 5 - 20:1
32.) 1-9 Reposed Skylanders - 10:1
33.) 10-19 Reposed Skylanders - 5:1
34.) 20-29 Reposed Skylanders - 4:1
35.) 30-39 Reposed Skylanders - 2:1
36.) 40-49 Reposed Skylanders - 3:1
37.) 50-59 Reposed Skylanders - 4:1
38.) 60-69 Reposed Skylanders - 5:1
41.) Trap Team portal works fully with Sky 5, no need for a new portal - 3:1
42.) Trap Team portal works in some way/shape/form with Sky 5, but still need a new portal - 3:1
43.) New portal required, Trap Team portal doesn't work at all - 2:1
51.) 20-29 New Skylanders (not reposes) - 3:1
52.) 30-39 New Skylanders (not reposes) - 2:1
53.) 40-49 New Skylanders (not reposes) - 3:1
54.) 50-59 New Skylanders (not reposes) - 4:1
55.) 60-69 New Skylanders (not reposes) - 5:1
56.) 70-79 New Skylanders (not reposes) - 5:1
61.) Some kind of 2-player online verses mode (Not including a mini-game, i.e.: Skystones, etc.) -3:1
62.) Some kind of 2-player online co-op mode (Not including a mini-game, i.e.: Skystones, etc.) - 4:1
61.) Some kind of 4 (or more)-player online verses mode (Not including a mini-game, i.e.: Skystones, etc.) - 10:1
62.) Some kind of 4 (or more)-player online co-op mode (Not including a mini-game, i.e.: Skystones, etc.) - 20:1
63.) On-line mode for Skylanders-themed mini-games (Skystones, etc.) for all major releases - 2:1
64.) On-line mode for Skylanders-themed mini-games (Skystones, etc.) for 3DS/New 3DS only - 1:1
65.) Local 4+ Player mode (not including a mini-game, i.e.: Skystones, etc.) - 5:1