Word order (just style or grammar)?

Solution 1:

As I see it:

1. Also, it will be shown that it is dead. - Adverbial free modifier modifying the whole sentence - usually followed by a comma.
2. It also will be shown that it is dead. – emphasises the future “will be shown”
3. It will also be shown that it is dead. . – emphasises the passive action of “be shown”.
4. It will be also shown that it is dead. – emphasises the showing aspect
5. It will be shown also that it is dead. – Also is itself emphasised and emphasises that the first attribute is not the only attribute.
6. It will be shown that, also, it is dead. – this ‘also’ is parenthetical, and not really essential.