Canon EOS-1D X Mark II to feature 4K video? [CW3]

Back in March we had a first hint that the Canon EOS-1D X Mark II might feature 4K video recording. The suggestion came from Mr. Masaya Maeda in an interview. The possibility of a 4K enabled EOS-1D X Mark II surfaced again in a fresh rumor. Despite being rumored to feature 4K, the EOS-1D X Mark II is said to be a mostly stills oriented cameras.