Salam Alaikum:
I agree with our sister Skye Ephémérine. It really does matter what your target audience is. If it's for Muslims but also to invite others to Islam, then the name needs to attract both, age is also a factor, etc.
If it's for everyone, then keep the name simple and easy to understand. Something as simple as ISLAM is understood immediately by all audiences. Whereas something written in Arabic or its transliteration is not, so it would require a translation under the title, or if written in English, the Arabic translation/transliteration under it.
May Allah, swt, grant you success with your endeavours!
Wasalam,
Hana