The Nintendo 3DS remake/Port epidemic!

[Evil Yoshi Toes]

On the subject of the Luigi's Mansion port/remake, will Nintendo add the rumored, unused Safari Ghost?

I highly doubt it. There's really not any solid evidence that it was ever even planned to be in the game at all, so I doubt they'll create a brand new enemy just because a rumor went around due to a misleading caption. I wouldn't expect a port to add any unused content, especially not content that was never planned to begin with.