On the note of the list, someone posted this poll found on the
Pokken site. Apparently the developers took a poll on who they felt the new candidate was and here were their reactions:
Due to the number of people who missed their prediction, it's probably not a "likely" candidate and they're probably a bit more left field then we're expecting. Granted, that doesn't rule out popular Pokémon as some of those would still have that surprise factor (or at least, would be surprising compared to others on this list), but I doubt it'd be someone everyone's guessing if that's the case.
A bit of a fun fact about the Unova trio is that collectively they are the shortest cover legendary trio, standing at ~9 (Zekrom and Kyurem), ~10 (Reshiram and Kyurem-B) and ~11 (Kyurem-W) ft tall. Every other cover legendary is either as tall as Kyurem-W or taller excluding Suicune (6'07 ft) and Xerneas (9'10 ft).
Ignoring Suicune (who was made into a Cover Legendary rather then planned as one), Zekrom in particular holds the title for being the shortest cover legendary, standing at 9'06 ft.