My ideas:
Have a "Team Leaders" set and just use the "C" from the captain's jersey and the "A" from the assistant. They would all be one of ones and I assume very sought after.
MTO auto memorabilia. Everyone loves the MTOs and it would be great if it could have an auto to go with the memorabilia.
Do not have normal base cards. Instead of base cards make them jersey cards. Have them numbered out of 90 and have a patch parallel out of 10. Maybe even make the patch out of 9 and have a one of one. That would be 100 cards per base card. Have a jersey set of 150 or so. That way you can use more 'filler' players.
I love the idea of coloured borders around the casing to the cards. I love the old slabbed card style and just have a gold, silver or black(or whatever colour you choose) as the top tier. That way when you open your pack you could just see what parallels that you have before you even look at the cards.
I would love to see Don Cherry cards like mentioned before.
Stick cards called "Blades". Just use the blade of the stick and have a big piece of it on the card. Yes I do realize that the curve would make it difficult to do. The wear and tear on the blade would be cool to see.
Have a jersey card of top players who were top ten picks over the last ten years. Make it like a six player jersey.
1st overall:
Tavares, Stamkos, Kane, E.Johnson, Crosby, Ovechkin, Fleury, Nash, Kovalchuk, DiPietro
2nd overall:
Hedman, Doughty, Van Riemsdyk, J.Staal, Ryan, Malkin, E.Staal, Lehtonen, Spezza, Heatley
3rd overall:
Duchene, Bogosian, Turris, Toews, J.Johnson, Barker, Horton, Bouwmeester, Svitov, Gaborik
4th overall:
E.Kane, Pietrangelo, Hickey, Backstrom, Pouliot, Ladd, Zherdev, Pitkanen, Weiss, Klesla
5th overall:
B.Schenn, L.Schenn, Alzner, Kessel, Price, Wheeler, Vanek, Whitney, Chistov, Torres
6th overall:
Ekman-Larsson, Filatov, Gagner, Brassard, Brule, Montoya, Michalek, Upshall, Koivu, Hartnell
7th overall:
Kadri, Wilson, Voracek, Okposo, Skille, Olesz, Suter, Lupul, Komisarek, Jonsson
8th overall:
Glennie, Boedker, Hamill, Mueller, Setoguchi, Picard, Coburn, Bouchard, LeClaire, Alexeev
9th overall:
Cowen, Bailey, Couture, Sheppard, Lee, Smid, Phaneuf, Taticek, Ruutu, Krahn
10th overall:
Paajarvi-Svensson, Hodgson, Ellerby, Frolik, Bourdon, Valabik, Kostitsyn, Nystrom, Blackburn, Yakubov
Make each card out of 9 and then have a patch version that is a one of one.