shortly

?An artificial island will shortly appear off the coast of Dubai.

The use of shortly to mean 'soon' is familiar in sentences like

1. She arrived shortly after us.
2. I saw him shortly before he died.
3. I bought a new umbrella but lost it shortly afterwards.
4. Ms. Jones will be back shortly.

or to mean 'curtly, impatiently':

5. I've explained that already, Rod said shortly.

Most of the occurrences of shortly in the news corpus [click to see] and the literary corpus [paritally filtered, click to see] were analogous to these. Those in the news corpus that seem problematic to my ear in a similar way as PS does are the following:

6. Bangladesh is expected to SHORTLY ban leaded gasoline.
7. He's SHORTLY to tour the UK.
8. Sources within Coopers suggest that Deloitte in Australia will SHORTLY announce it is to side with Coopers.
9. The suspect will SHORTLY be flown to Bogota to face smuggling charges, authorities said here yesterday.
10. The inhabitants of Shandong province in China will SHORTLY be able to warm their toes by a gas fire when winter sets in.
11. It is expected that he will SHORTLY be tried on treason charges, which carry the death penalty.
12. The idea that the Warsaw Pact would be able to mount a surprise attack on Nato will SHORTLY be barely plausible.
13. Whether or not we will SHORTLY have a passive computer lobby, it certainly gives a new meaning to the hacking cough.
14. The malaise never left him. And seven years later he developed the lymphoma that will SHORTLY kill him.
15. I will add that I hope you will SHORTLY remove those obstacles.

The most direct analogues to PS are 14 and 15. To my ears, soon is much more likely in all of these sentences (6-15), and shortly sounds old fashioned, formal, and/or simply odd.