The wording of the article title gives the impression that they will stick with the engines they have got. Really they are just going to develop the engines they have and not design from scratch any new engines.

A new engine from scratch rarely happens. Many engines can be traced back decades with there never being a new design, just iterative improvement.

Can anyone think of a new engine developed from scratch? Without any parts carried over?

I suppose this happened when VW built the Veyron.