Blondie's post is the most recent information on that.
for many years, my recollection was that jesus "arrived" in 1914, thus your point according to 1 Cor. 11:26 would be valid, that the memorial does not need to occur any longer since Jesus arrived in 1914. However as Blondie pointed out, the WTS plays symantics on this point in the now infamous July 15, 2013 Study edition
par 11 & 19
11 In the mid-1990’s, The Watchtower reexamined Matthew 25:31, which states: “When the Son of man arrives in his glory, and all the angels with him, then he will sit down on his glorious throne.” It was noted that Jesus became King of God’s Kingdom in 1914, but he did not “sit down on his glorious throne” as Judge of “all the nations.” (Matt. 25:32; compare Daniel 7:13.) However, the parable of the sheep and the goats describes Jesus primarily as Judge. (Read Matthew 25:31-34,41, 46.) Since Jesus was not yet active as Judge of all nations in 1914, his judgment of people as sheep or goats could not have started in that year. * When, then, will Jesus’ judgment begin?
19 In review, what have we learned? In the beginning of this article, we raised three “when” questions. We first considered that the great tribulation did not begin in 1914 but will start when the United Nations attacks Babylon the Great. Then, we reviewed why Jesus’ judgment of the sheep and the goats did not begin in 1914 but will occur during the great tribulation. Finally, we examined why Jesus’ arrival to appoint the faithful slave over all his belongings did not occur in 1919 but will take place during the great tribulation.
so basically Jesus has "two arrivals", one in 1914 when he was apppointed King, and a 2 when he "arrives" as "Judge"
of course he will judge the sheep and the goats in a yet unknown future time during the great tribulation. At THIS time, the memorial should cease to occur. BUt who knows with the WTS, even they can't remember what they believe anymore
