"Πρόκειται να πάω εκεί."

[Glossmad]

I was marked wrong for 'I will be going there', the meaning of which is pretty much the same as 'I am going to go there'

[Royal_Gala]

I would translate "I will be going there" as "Θα πηγαίνω εκεί" which is not the same in terms of duration or intention of the action