will the new items stick around after the event?

i think that the new items coming to lol soon are looking to be awesome, but i am worried that they might be removed once the event ends. do you think that the new items are here to stay or that they are a limited time thing

comment your opinion below
(note: i realize that some of these things may be just riot testing out new ideas and my be buffed/nerfed/removed also i realize that the kayn boots are likely not going to stay as they basically copy his E)

Zeta out!!!