This citizenship will be by invitation only. You can not just apply after fulfilling few conditions for it.
Just a few people will have a right to propose a person to be invited.
So, just a plain investment will not make any higher chance to be invited. There are too many people who can bring few millions. They are interested in people who can offer som significant benefits for the country. Like olympic games winners who can win a medal for a country in a next olympic games, or scientist who are developing a technology which can change some industry, etc..
If do not read︀ about you in a local newspapers on a very often period, you can forget about︁ possibility to be invited.. UAE has enough money to invest. They need a human resources,︂ which it is not so easy to obtain like some project financing..
By the way,︃ the most countries in a world offer, just not officialy, a citizenship for a people︄ who make a significant constribution to the country. If you are aolympic games winner, almost︅ any country is willing to offer you a citizenship in exchange for representing this country︆ in a next olympic games.. And it is the same in any field of human︇ activity. If you are top 0,01 %, you are welcomed almost everywhere..