Where in scripture do you read that Christ returns in secret? That passage in 1 Corinithians is a description of Christ's 2nd coming.
You posted scripture that says there is no secret about his 2nd coming:
Mat 24:23 Then if any man shall say unto you, Lo, here is Christ, or there; believe it not.
Mat 24:24 For there shall arise false Christs, and false prophets, and shall show great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.
Mat 24:25 Behold, I have told you before.
Mat 24:26 Wherefore if they shall say unto you, Behold, he is in the desert; go not forth: behold, he is in the secret chambers; believe it not.
Mat 24:27 For as the lightning cometh out of the east, and shineth even unto the west; so shall also the coming of the Son of man be.
The 2nd coming of Christ will be the most visible event there is. There is no secret 2nd coming and a 3rd visible coming. At least not in scripture.
In the rapture, we meet him "in the air," but at the visible second coming he definately sets foot on the earth.