The phrase "a massive and possibly" is correct and usable in written English.
It can be used when discussing something that is large in scale and has an uncertain or potential aspect to it.
Example: "The project could lead to a massive and possibly transformative change in the industry."
Alternatives: "a significant and perhaps" or "a large and maybe".
Predicting a "massive" and possibly "astronomical" turnout, he added on the NBC News program "Meet the Press".
King's idea for a massive, and possibly electrified, border wall at the U.S.-Mexico border long predates President Trump's.
This will prevent a massive, and possibly dangerous leak of (recently vaporized) liquid He from the top of the Dewar, when opened in the next step.
That's key because too much inflammation can cause an arterial plaque to suddenly rupture, triggering a massive clot and possibly even a heart attack.
The potential damage and disorder to the $20 trillion U.S. economy could be massive and, possibly, incalculable.
Invariably, the crowd will leap to its feet at the sight of two titans exchanging massive and possibly catastrophic blows.
The leaders of places as varied as Toronto to Newark (two finalists for the HQ2 bid) are not crazy to be offering massive (and possibly secret) tax breaks in hopes of winning Amazon's favor it really could improve their short-term finances or at least attract a lot of tourism and the wealth that comes with it.
"It will turn the MB92 into an absolutely massive and quite possibly the largest yard in the world," said Mr. Thomas, referring to Marina Barcelona '92.
FIFA Ultimate Team is now a massive deal, possibly the draw for any new FIFA title, and PES has its Master League mode.
A massive recall of possibly tainted dog and cat food in north America, coupled with an ever-growing number of attributable animal deaths, has sent shock waves through the country's $15bn£7.6bnbn) pet food industry.
And then they commissioned perjury on a massive scale- possibly a million separate counts- through the robo-signing scam to try to foreclose on homes as fast as they could.
