Earth 4.6 billion yrs old, well over 1 billion existing/pre existing species

This would make evolution impossible in that time frame.

I think you’re assuming that new species evolve one at a time. That’s nonsense. If we start with one species and assume that on average a new species splits off an old one every 10,000 years, then (discounting extinctions) the number of new species would progress as follows:

Time..........Number of Species
0...............1 (2 to the power of 0)
10K...........2 (2 to the power of 1)
20K...........4 (2 to the power of 2)
30K...........8
40K...........16
50K...........32
60K...........64
70K...........128
80K...........256
90K...........512
100K.........1,024
…
300K..........More than a billion (2 to the power of 30)

Got that? More than a billion species in 300,000 years. Life has been around for about 3.5 billion years. There has been far more than enough time for all the species that have lived on earth to have evolved many times over. The only reason we don’t have many more species than we do is that species evolve to fill available ecological niches, and the number of niches available at any one time is limited.

Yes, evolution suggests that all living organisms share a common ancestor. The problem with your calculation is that evolution is not a linear process, but a branching one, one species evolves into at least two new species, and then these new species each evolve into two or more new species.

Given that each evolved species continues to evolve, and assuming that each species evolves into only two new species, the number of 1 billion species can be reached in as few as 30 evolutionary "generations," since 2^30 = 1.07 billion. Over 4.6 billion years, this leaves 153 million years for each new species to evolve.

This is about as logical as saying, "I'm 31, I have four pre existing grandparents. This would make blueberry pie fictional." Dude, your question makes no sense. Are you using Google Translate to translate your question from another language into English? If so, then I apologize.

New species can be made in just a few years! The intensity of competition, food sources, and predators has much to do with specie creation rates. A few years refers to a few hundred. Moth studies in England show this to be true.

And what exactly backs up your claim?