XY 134 already? The newest promos are only at 100. Where are the other 30!?
I'm really bored so I felt like addressing the possibilities to this question
I think this is a jump is to leave exactly enough space for all of the new promo cards coming out as part of the 20th anniversary and BREAKpoint/XY10 themed boxes:
Breakpoint Promos:
94 - BREAKpoint PrereleasePromo (Assume its Greninja)
95 - Pikachu
96 - Umbreon
Tins:
103 - Mewtwo EX
104 - Machamp EX
105 - Gyrados EX
Boxes:
106 - Red Gyrados
107 - Mew
108 - Celebi
109 - Jirachi
110 - Darkrai
111 - Manaphy
112 - Shaymin
113 - Arceus
114 - Victini
115 - Keldeo
116 - Genesect
117 - Meloetta
118 - Charizard EX
119 - Blastoise EX
120 - Venusuar EX
121 - Pikachu EX
122 - Ash-Greninja EX
Assuming that something weird isn't going to happen we can conclude the second JP Promo Mewtwo and Mawile EX will see Promo releases which means:
123 - Mewtwo EX
124 - Mawile EX
125 - M-Mawile EX
126 - Mawile Spirit Link
I think we can also make the assumption that the Eeveelution EX's will see a promo release. Notice how the eeveelutions are all done by Naoki Saito (a non-EX/3-D artist) where as the other three (Meowstic, Golem, and Ninetales) are all by the traditional EX artists. As well, Non 3-D EX artwork has a proven tenancy to end up on the promo/mini-set side of the TCG with only exceptions being those composed by Ryota Murayama (Groudon EX, Kyogre EX, Rayquaza EX, and Hoopa EX) which all happen to be "cover cards" of their sets and borderline 3-D unless examined closely (I didn't even notice Groudon and Kyogre were non 3-D until I began gathering details for this post).
127 - Vaporeon EX
128 - Jolteon EX
129 - Leafeon EX
And furthermore, if we assume the unreleased unique Gym challenge promos (JP numbers cited for reference) will see a English release as part of XY10 blister promos, then:
130 - XY10 Pre-release Promo (Delphox)
131 - Lanturn (111/XY-P)
132 - Vivillion (165/XY-P)
133 - T̶o̶a̶d̶ ̶K̶i̶l̶l̶e̶r̶ Marowak (169/XY-P)
Now, this puts us snuggly up to the BREAKevolution box promos, but cards can also be moved around and space can be filled with cards like the new Greninja promo in japan and things we haven't seen yet.
RANDOM FUN FACT: They guy who drew (baby) Hoopa EX and Pikachu EX is the guy who designed the Tyrantrum, Aurorus, Pangoro, Malamr, and Inkay evolution lines.