I don't know how you imagine an online Zen temple. What should be clear, is that a temple is a place of religious service. People go there to get something. Most of the time rituals. Even in a Zen temple. It can also be a place of worship, as it usually houses a buddha statue, sutras, and occasionally relics. Temples also have at least one priest to do the services. Question is then, are you a priest, or do you know one to serve in the online temple? Another function of temples is community life. The online form of community life is found in forums, chatrooms and networking sites. Are you planning to have that too?
"While teachers of the middle way, mind only, transcendent wisdom, mantra, and other schools may have their own assertions, the fulfillment of those intentions is the same. There is not a single thing that is not contained within mind."
(Gampopa to Düsum Khyenpa, in "The First Karmapa", KTD Pub, p254)
“If you recognize the world of appearance and existence as the mind, realize the mind itself as empty, and have no grasping at the superiority of your realizations — this is the ultimate view."
(Chegom Dzongpa, in "The Book of Kadam", Wisdom Pub, p609)