Dear blizzard, could we at least see a concept art for the mounts? My voting is not only based on theme but probably the skeleton/size of the mounts.
I voted ancient wanderer first because it will have either the gronling/yeti or infernal skeleton like - https://warcraftmounts.com/mounts/hellfireinfernal.php or https://warcraftmounts.com/mounts/gorestridergronnling.php
My second pick would be the slime cat, because the slime cat pet looks cool, the slime saber would def look great, its a saber cat skeleton so we all can know how decent it would look like at least. https://warcraftmounts.com/search.php?search=1&term=saber&x=0&y=0&incretired=on
The third pick would be nerubian, but considering the pet version is just a blood leech like https://warcraftmounts.com/mounts/leapingveinseeker.php, it would look dreadful in most races. If it would be a Nerubian like the bosses from the wotlk dungeons or raid, i`d be all in for voting that first pick like https://wow.zamimg.com/uploads/screenshots/normal/114506-anubarak.jpg or https://vignette.wikia.nocookie.net/wowwiki/images/c/c9/Krik'thir_the_Gatewatcher.jpg/revision/latest?cb=20080922003650
The spelltome sounds interesting but in all honesty the base model will be either the mage disc or some fish mount, so that`s a big frown on me https://warcraftmounts.com/mounts/archmagesprismaticdisc.php
The caterpillar is the lamest by far, skeleton model prob copying crocolisks/basilisks/krolusks https://warcraftmounts.com/mounts/viciouswarbasiliskhorde.php or https://warcraftmounts.com/mounts/conquerorsscythemaw.php
So please, at least getting a small concept art preview we can vote better to what would really be a cool unique mount.
Gib us the small taste