No one knows...
Th 11 not coming.
Nothing about TH11 has been confirmed. Some people speculate it could be featured at the ClashCon update but... I personally doubt it.
"If I look back I am lost."
TH 9 l GG 840m l EE 733m l HH 2m l AQ18 / BK18 l Legos 135 / Lavas 115All Time Best 3091
Town Hall 10, Level 123 IGN:beast Clan: Black Reign (Main: Hard Reign)
GG: 668 million EE: 663 million HH: 1.86 million AQ:25 BK:31
From the information supercell have given it points towards no th11 just yet.
Firstly the fact that supercell have been for a month now saying that clash con will be game changing. Every other game changing update that they have announced or you tubers have announced has been either: a new defense(though not popular), a new troop or a big new feature like clan wars and dark spells.
Secondly the fact that new walls were added to th10 recently. More walls says that they are aiming to hold th10 over for longer(maybe th11 next year). Also the walls colour change is a subtle pointer to the fact there won't be th11, th9-10 have both had precursors to their theme with the previous level walls(skulls and lavas). Unless th11 is just gonna be more magma then the wall change points away from th11.
Lastly the fact that this game already takes years to complete. Adding th11 would probably have to double this time and, while supercell also have appeal to their top players as they make the most money, supercell must also bring out updates that will grab potential downloaders as well. It's about dangling the carrot far enough from people face that they spend money to attempt to grab it but, not so far as to discourage them from trying. Ever seen cats with laser pointers? All fun while its within reach but as soon as the cat knows he can't get it he will stop trying.
From an initial buyers point of view do you really want to hear in an update that there's been a feature added that affects only the top 0.01% of the games population? I'd bet on that they would prefer to hear about an update that gives them a new feature.