Sir, I saw that site a good while back, and it's full of imagination, conjecture, & guesswork.
First of all, when I was a child, I looked up at the clouds, especially when a collection of cumulus clouds was passing, & I imagined they were everything from dragons, flying fish & whales, to fighter planes & spaceships, to Santa's sleigh with flying reindeer. Apparently, some grown men played this same game that almost every child plays. And Josephus had been a leader of a Jewish rebellion against Rome who'd been forced to surrender, but managed to ingratiate himself to Vespasian, who adopted him as a member of the Flavius family. Naturally, Josephus was very careful not to displease any natural Flavius member! Thus, he embellished some of his stories.
Calling the likeness of a Roman ruler on a coin the "mark of the beast" is indeed a stretch!!!!!!!!!! In that case, we should call the US Presidents who appear on our money "beast-ettes"!!!!!!!!I dismiss that whole thingie as poppycock! (Remember, Jesus asked, "Whose likeness is on this coin?" & the answer was "Caesar's" He did NOT call it an idol or mark of the beast, but He said, "Render to Caesar what belongs to Caesar.")
So, please tell us when all life in the seas died. When was all green grass burned up? When was Jerusalem split into 3 parts by an earthquake? When did a ruler set up a talking statue in the temple in Jerusalem? When was there a rain of 100-LB rocks?
Was Nero the "antichrist"? Most assuredly NOT! Revelation says no man can defeat the AC, but Nero was brought down by General Galba & friends. And Nero was NOT cast alive into the lake of fire; he DIED in front of several witnesses who tried to save him after he had his secretary Epaphroditus stab him with a sword. Nor did he have a miracle-working false prophet as his deputy. And there are many more criteria for the "beast/antichrist/man of sin' that Nero didn't meet, while the TRUE 'beast MUST meet every one of them EXACTLY!
I hope you compare actual unbiased history with Scripture to see that the prophesied eschatological events have NOT yet occurred, so you realize preterism is simply a false doctrine invented by MAN, made prominent by some jeezits who wanted to protect the pope frombeing labeled the 'beast. (Another false doctrine in itself! )